煤气设备设施的改造和施工，必须由什么单位进行。

阅读理解

     What is the hottest topic at your school recently? In Hangzhou Yongjin Middle School, it' s money.

     The school held an activity called "making money" last weekend. About 200 Junior l and Junior 2 students were

divided int0 30 teams. They went out to make money by selling things.

     What did they choose to sell? Some sold newspapers, some chose bottled water, some sold environmentally

friendly shopping bags and bamboo baskets.

     Hu Qing's team decided to sell some useful books in front of the Children Activity Center. They thought parents

would like to buy the books for their children. But unfortunately, they met urban management officers(域管). The

officers asked them to leave. "We played hide-and-seek (捉迷藏) with the officers for the whole morning ," said

Hu. "Finally we had to give up."

     Wang Bing and her team sold ice cream in a square. They didn't meet any officers. But few people were interested

in what they were selling. The team then put up a board saying "For Country Kids". It worked.

     More people came to their stall (小摊). A foreigner even gave them 100 yuan. "He didn't want any change. He said

he wanted to help the children," said Wang. "We were touched." Later that day they gave the 100 yuan and more to

the "Project Hope" office.

     Meng Zhaoxiang and his team were luckier. They sold all their cakes in four hours, spending 39.5 yuan and getting

back 80 yuan. They made 40.5 yuan. "It was not easy to make money," said Meng. "Some people just looked. Others

just tasted but didn't buy. Now I know how hard it is for our parents to make money we need to lead happy lives."

1. In Hangzhou Yongjin Middle School, what the students talk more about is ______.

A. the officers

B. the kind foreigner

C. the activity called "making money"

2. ______ took part in the activity.

A. Part of Junior l and Junior 2 students

B. All the students

C. About 200 students of the three grades

3. Hu Qing's team finally gave up because ______.

A. the parents didn't like to buy the books.

B. the Children Activity Center was too crowded.

C. the officers didn't allow them to sell anything there.

4. Why did more people come to Wang Bing's stall at last?

A. The team put up a magic board.

B. A foreigner came up and helped them.

C. The people liked to help country kids.

5. According to the passage the students learn ______.

A. it's impossible for them to make money

B. it's not easy for their parents to make money

C. it's very important for them to make a living

特种作业人员要经业务主管部门培训和考核才能上岗作业。

实施COPC的核心是下列哪项（）

A.社区诊断

B.社区参与

C.制订COPC计划

D.权利增长

资料1

资料2

资料3

请根据以上资料，选择以下栏目的正确选项：

“包装种类”栏：（）。

A．纸箱

B．集装箱

C．裸装

D．木箱

什么是气动薄膜调节阀的正作用和反作用？根据什么原则选择气开式或气关式的调节阀？